Closed-circuit cooling tower manufacturers talk about why closed-circuit cooling towers have so much water consumption?

Jiangsu Yunuo Cooling Technology introduces closed cooling tower manufacturers to talk about why closed cooling towers have so much water consumption.

The objective function structure optimization, through the mutual cooperation of different cooling components, can effectively reduce the operating power of the closed cooling tower. Coolant optimization, different coolants have a very important and decisive role in the cooling effect of the closed cooling tower. The operating environment of the closed cooling tower (environmental optimization), the installation of the closed cooling tower in a ventilated environment can effectively improve the operating power, which is conducive to the smooth air circulation in the tower. In today's society, various resources in our country are relatively short, especially water resources. The pollution of water resources in our country is serious, most of which are due to the discharge of industrial wastewater, and water is a non-renewable resource, so saving water is particularly important. Important, the closed cooling tower I told you about consumes a lot of water during operation, so what is the reason? How to solve this problem.

In the water-gas heat exchange of the closed cooling tower, the evaporation of water absorbs latent heat and the temperature of humid air absorbs sensible heat, which is the reason for the temperature drop of cooling water. As we all know, the latent heat of water evaporation is very large (about 2427.9 KJ/KG or 580Kcal/KG) and the specific heat of air is very small (0.2Kcal/kg°C), so in the two heat transfer methods, especially when the climate temperature is relatively high, the heat absorbed by the transpiration of water is The main cause of cooling water cooling, and the temperature difference transfer between water and air is unnecessary, and the ratio of the two will change with climatic conditions. Generally, it can be set that the heat absorption by water transpiration accounts for 75~80% of the total heat dissipation, and the heat transfer by temperature difference accounts for 20~25%. The consumption of cooling water caused by some water transpiration is normal and necessary, and its consumption is not only the same as the cooling water itself It is related to the mass, flow, and cooling range (ie heat load) of the water tower, and it is also related to the temperature of the air entering the tower (including the dry bulb temperature and the wet bulb temperature) and the mass flow rate, and this ratio is used to estimate the air consumption of the water tower, but in fact Otherwise, many materials indicate that the measured data of our company also confirms that the heat absorbed by water transpiration changes obviously with climatic conditions, the high can reach more than 95%, and the low is less than 75%. Understand the working principle of closed cooling tower, It is not difficult to analyze the water consumption, if the leakage of the cooling water system is not considered.

Appropriate amount of cooling water should be vented. In order to ensure that the quality of cooling water meets environmental protection requirements, a certain proportion of cooling water is allowed to be vented to make up for the renewal. Generally, the venting amount is controlled at 0.3% of the total cooling water, and the venting amount can also be determined by the user according to the environmental protection technical specifications. This is an abnormal water consumption, and it is also one of the indicators to measure the technical function of a closed cooling tower. Generally, the loss of floating water should be controlled below 0.2% of the total cooling water. Its size and the structure of the water tower (whether or not It is related to factors such as water removal equipment), the function of the fan (including the adjustment of air volume, wind pressure and blade viewpoint and the matching between them, etc.), the matching of the water pump and the installation quality of the water tower.

The above is the relevant content introduced by Jiangsu Yunuo Cooling Technology.